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<pre><span class="sourceLineNo">001</span><a id="line.1">/*</a>
<span class="sourceLineNo">002</span><a id="line.2"> * Licensed to the Apache Software Foundation (ASF) under one or more</a>
<span class="sourceLineNo">003</span><a id="line.3"> * contributor license agreements.  See the NOTICE file distributed with</a>
<span class="sourceLineNo">004</span><a id="line.4"> * this work for additional information regarding copyright ownership.</a>
<span class="sourceLineNo">005</span><a id="line.5"> * The ASF licenses this file to You under the Apache License, Version 2.0</a>
<span class="sourceLineNo">006</span><a id="line.6"> * (the "License"); you may not use this file except in compliance with</a>
<span class="sourceLineNo">007</span><a id="line.7"> * the License.  You may obtain a copy of the License at</a>
<span class="sourceLineNo">008</span><a id="line.8"> *</a>
<span class="sourceLineNo">009</span><a id="line.9"> *      http://www.apache.org/licenses/LICENSE-2.0</a>
<span class="sourceLineNo">010</span><a id="line.10"> *</a>
<span class="sourceLineNo">011</span><a id="line.11"> * Unless required by applicable law or agreed to in writing, software</a>
<span class="sourceLineNo">012</span><a id="line.12"> * distributed under the License is distributed on an "AS IS" BASIS,</a>
<span class="sourceLineNo">013</span><a id="line.13"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</a>
<span class="sourceLineNo">014</span><a id="line.14"> * See the License for the specific language governing permissions and</a>
<span class="sourceLineNo">015</span><a id="line.15"> * limitations under the License.</a>
<span class="sourceLineNo">016</span><a id="line.16"> */</a>
<span class="sourceLineNo">017</span><a id="line.17">package org.apache.commons.dbutils.wrappers;</a>
<span class="sourceLineNo">018</span><a id="line.18"></a>
<span class="sourceLineNo">019</span><a id="line.19">import java.lang.reflect.InvocationHandler;</a>
<span class="sourceLineNo">020</span><a id="line.20">import java.lang.reflect.Method;</a>
<span class="sourceLineNo">021</span><a id="line.21">import java.sql.ResultSet;</a>
<span class="sourceLineNo">022</span><a id="line.22"></a>
<span class="sourceLineNo">023</span><a id="line.23">import org.apache.commons.dbutils.ProxyFactory;</a>
<span class="sourceLineNo">024</span><a id="line.24"></a>
<span class="sourceLineNo">025</span><a id="line.25">/**</a>
<span class="sourceLineNo">026</span><a id="line.26"> * Wraps a {@code ResultSet} to trim strings returned by the</a>
<span class="sourceLineNo">027</span><a id="line.27"> * {@code getString()} and {@code getObject()} methods.</a>
<span class="sourceLineNo">028</span><a id="line.28"> *</a>
<span class="sourceLineNo">029</span><a id="line.29"> * &lt;p&gt;</a>
<span class="sourceLineNo">030</span><a id="line.30"> * Usage Example:</a>
<span class="sourceLineNo">031</span><a id="line.31"> * This example shows how to decorate ResultSets so processing continues as</a>
<span class="sourceLineNo">032</span><a id="line.32"> * normal but all Strings are trimmed before being returned from the</a>
<span class="sourceLineNo">033</span><a id="line.33"> * {@code ResultSet}.</a>
<span class="sourceLineNo">034</span><a id="line.34"> * &lt;/p&gt;</a>
<span class="sourceLineNo">035</span><a id="line.35"> *</a>
<span class="sourceLineNo">036</span><a id="line.36"> * &lt;pre&gt;</a>
<span class="sourceLineNo">037</span><a id="line.37"> * ResultSet rs = // somehow get a ResultSet;</a>
<span class="sourceLineNo">038</span><a id="line.38"> *</a>
<span class="sourceLineNo">039</span><a id="line.39"> * // Substitute wrapped ResultSet with additional behavior for real ResultSet</a>
<span class="sourceLineNo">040</span><a id="line.40"> * rs = StringTrimmedResultSet.wrap(rs);</a>
<span class="sourceLineNo">041</span><a id="line.41"> *</a>
<span class="sourceLineNo">042</span><a id="line.42"> * // Pass wrapped ResultSet to processor</a>
<span class="sourceLineNo">043</span><a id="line.43"> * List list = new BasicRowProcessor().toBeanList(rs);</a>
<span class="sourceLineNo">044</span><a id="line.44"> * &lt;/pre&gt;</a>
<span class="sourceLineNo">045</span><a id="line.45"> */</a>
<span class="sourceLineNo">046</span><a id="line.46">public class StringTrimmedResultSet implements InvocationHandler {</a>
<span class="sourceLineNo">047</span><a id="line.47"></a>
<span class="sourceLineNo">048</span><a id="line.48">    /**</a>
<span class="sourceLineNo">049</span><a id="line.49">     * The factory to create proxies with.</a>
<span class="sourceLineNo">050</span><a id="line.50">     */</a>
<span class="sourceLineNo">051</span><a id="line.51">    private static final ProxyFactory factory = ProxyFactory.instance();</a>
<span class="sourceLineNo">052</span><a id="line.52"></a>
<span class="sourceLineNo">053</span><a id="line.53">    /**</a>
<span class="sourceLineNo">054</span><a id="line.54">     * Wraps the {@code ResultSet} in an instance of this class.  This is</a>
<span class="sourceLineNo">055</span><a id="line.55">     * equivalent to:</a>
<span class="sourceLineNo">056</span><a id="line.56">     * &lt;pre&gt;</a>
<span class="sourceLineNo">057</span><a id="line.57">     * ProxyFactory.instance().createResultSet(new StringTrimmedResultSet(rs));</a>
<span class="sourceLineNo">058</span><a id="line.58">     * &lt;/pre&gt;</a>
<span class="sourceLineNo">059</span><a id="line.59">     *</a>
<span class="sourceLineNo">060</span><a id="line.60">     * @param rs The {@code ResultSet} to wrap.</a>
<span class="sourceLineNo">061</span><a id="line.61">     * @return wrapped ResultSet</a>
<span class="sourceLineNo">062</span><a id="line.62">     */</a>
<span class="sourceLineNo">063</span><a id="line.63">    public static ResultSet wrap(final ResultSet rs) {</a>
<span class="sourceLineNo">064</span><a id="line.64">        return factory.createResultSet(new StringTrimmedResultSet(rs));</a>
<span class="sourceLineNo">065</span><a id="line.65">    }</a>
<span class="sourceLineNo">066</span><a id="line.66"></a>
<span class="sourceLineNo">067</span><a id="line.67">    /**</a>
<span class="sourceLineNo">068</span><a id="line.68">     * The wrapped result.</a>
<span class="sourceLineNo">069</span><a id="line.69">     */</a>
<span class="sourceLineNo">070</span><a id="line.70">    private final ResultSet rs;</a>
<span class="sourceLineNo">071</span><a id="line.71"></a>
<span class="sourceLineNo">072</span><a id="line.72">    /**</a>
<span class="sourceLineNo">073</span><a id="line.73">     * Constructs a new instance of {@code StringTrimmedResultSet}</a>
<span class="sourceLineNo">074</span><a id="line.74">     * to wrap the specified {@code ResultSet}.</a>
<span class="sourceLineNo">075</span><a id="line.75">     * @param rs ResultSet to wrap</a>
<span class="sourceLineNo">076</span><a id="line.76">     */</a>
<span class="sourceLineNo">077</span><a id="line.77">    public StringTrimmedResultSet(final ResultSet rs) {</a>
<span class="sourceLineNo">078</span><a id="line.78">        super();</a>
<span class="sourceLineNo">079</span><a id="line.79">        this.rs = rs;</a>
<span class="sourceLineNo">080</span><a id="line.80">    }</a>
<span class="sourceLineNo">081</span><a id="line.81"></a>
<span class="sourceLineNo">082</span><a id="line.82">    /**</a>
<span class="sourceLineNo">083</span><a id="line.83">     * Intercept calls to the {@code getString()} and</a>
<span class="sourceLineNo">084</span><a id="line.84">     * {@code getObject()} methods and trim any Strings before they're</a>
<span class="sourceLineNo">085</span><a id="line.85">     * returned.</a>
<span class="sourceLineNo">086</span><a id="line.86">     *</a>
<span class="sourceLineNo">087</span><a id="line.87">     * @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])</a>
<span class="sourceLineNo">088</span><a id="line.88">     * @param proxy Not used; all method calls go to the internal result set</a>
<span class="sourceLineNo">089</span><a id="line.89">     * @param method The method to invoke on the result set</a>
<span class="sourceLineNo">090</span><a id="line.90">     * @param args The arguments to pass to the result set</a>
<span class="sourceLineNo">091</span><a id="line.91">     * @return string trimmed result</a>
<span class="sourceLineNo">092</span><a id="line.92">     * @throws Throwable error</a>
<span class="sourceLineNo">093</span><a id="line.93">     */</a>
<span class="sourceLineNo">094</span><a id="line.94">    @Override</a>
<span class="sourceLineNo">095</span><a id="line.95">    public Object invoke(final Object proxy, final Method method, final Object[] args)</a>
<span class="sourceLineNo">096</span><a id="line.96">        throws Throwable {</a>
<span class="sourceLineNo">097</span><a id="line.97"></a>
<span class="sourceLineNo">098</span><a id="line.98">        Object result = method.invoke(this.rs, args);</a>
<span class="sourceLineNo">099</span><a id="line.99"></a>
<span class="sourceLineNo">100</span><a id="line.100">        if (result instanceof String</a>
<span class="sourceLineNo">101</span><a id="line.101">                &amp;&amp; (method.getName().equals("getObject")</a>
<span class="sourceLineNo">102</span><a id="line.102">                || method.getName().equals("getString"))) {</a>
<span class="sourceLineNo">103</span><a id="line.103">            result = ((String) result).trim();</a>
<span class="sourceLineNo">104</span><a id="line.104">        }</a>
<span class="sourceLineNo">105</span><a id="line.105"></a>
<span class="sourceLineNo">106</span><a id="line.106">        return result;</a>
<span class="sourceLineNo">107</span><a id="line.107">    }</a>
<span class="sourceLineNo">108</span><a id="line.108"></a>
<span class="sourceLineNo">109</span><a id="line.109">}</a>




























































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